Iran shoots down U.S. drone and pushes tensions further

Heightened tensions between the U.S. and Iran have risen further, after Iran shot down a U.S. drone. President Trump called the incident a “very big mistake” but later appeared to downplay it. The Iranian military warned that an enemy in its territory would be “destroyed,” but the head of U.S. air forces in the Middle East said the drone had never entered Iranian airspace. Nick Schifrin reports.